We're having trouble displaying this Scratch project.If you are on a mobile phone or tablet, try visiting this project on a computer.If you're on a computer, your Flash player might be disabled, missing, or out of date.
The standard deviation is one of those tricky concepts that a person can know how to find but they still don't understand what it is or what different standard deviations mean.
In this activity, we take the names of the students in the class and analyze how spread out the letters in their names are so that we can visualize the standard deviation.
We compare each name to other names and relate the standard deviation to the mean, range, and number of letters in each name.
The traditional way we do this activity is for me to tell the story behind the activity and then to give the students the activity to perform.
The activity itself has the story on it, but I prefer to tell it rather than have them read it from the sheet so that it is more animated.
After distributing the activity sheet, the students will use computer software to find the mean, median, and standard deviation of the letters in their name.We use the Statdisk software that accompanies the Triola statistics text.The book and software are distributed by Addison Wesley, a corporate sponsor of the ICTCM.While the traditional method has all the excitement that the instructor can muster, it does require the students to use another software package to find the statistical values.It also has the limitation that the examples that are shown are limited to the ones that the instructor has worked out and put on the activity.By designing an online activity, the instructor can take data that the online student supplies and find the values.